I did a BIG job of 6061T-6, with the same 5183. It was all pipe, mostly 3" sch. 10. I developed a habit that helped me. It took time to perfect, but I developed a rythm where as I added rod I would draw the torch back slightly to allow for the swell of the addition to the puddle, and move back in as I advanced. (Oddly, this worked best to music... ) This allowed me to stay in tight constantly while keeping the tungsten out of the puddle. (Was 10% x-ray, and it didn't take much tunsten residue in the puddle for a "fail".)zank wrote:
...Steve, yeah, I'm still too close with the tungsten. I am so used to keeping such a tight arc with steel and titanium. And I still need a lot of practice on my stops...
As for the stops, I learned to take advantage of the residual heat, and "button off" my welds much like when MIG welding. I'd pause maybe half a second to let the puddle cool, then hit the pedal and feed rod in a brief motion.
I think you're doing great! It's just the fact that you're so accustomed to welding metals with much lower expansion/shrink volumes that is giving you issues.
Patience and practice...
Steve S